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About this programme

2/4. The detective investigates a double poisoning, aiming to prove the innocence of Elinor Carlisle, the chief suspect in the deaths of her aunt and her rival in love. However, it emerges that she is the only person with a motive, opportunity and means to administer the poison. Crime drama, starring David Suchet, Elisabeth Dermot-Walsh, Diana Quick, Paul McGann and Rupert Penry-Jones.